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 Post subject: Enabling 16bit nandflash support for AT91SAM9G20-EK(2mmc).
PostPosted: Mon Aug 29, 2011 10:02 am 
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Joined: Wed Apr 27, 2011 6:31 am
Posts: 25
Hi,

I'm using AT91SAM9G20-EK(2mmc-Slots) Custom board with 16 Bit NAND Flash MT29F2G16AABWP-ET.
In order to build linux in this board(AT91SAM9G20-EK with 16 Bit NAND Flash MT29F2G16AABWP-ET ), what are modifications I should do with
1. Bootstrap

2.U-Boot

3.Linux-Kernel

4. Root file system.

Please help me to proceed.

Regards,

Thenral


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 Post subject: Re: Enabling 16bit nandflash support for AT91SAM9G20-EK(2mmc).
PostPosted: Mon Aug 29, 2011 3:14 pm 
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Joined: Sat Oct 30, 2010 6:04 pm
Posts: 574
I think that part is already in the nand_ids.h table of at91bootstrap, it should be able to auto-identify it. Check the datasheet and ID values against the table, which also contains memory geometry information. For new/different parts you would need to add data to this table. Subsequent code should also be able to detect the part.


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 Post subject: Re: Enabling 16bit nandflash support for AT91SAM9G20-EK(2mmc).
PostPosted: Mon Aug 29, 2011 7:26 pm 
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Joined: Wed Jan 09, 2008 5:09 pm
Posts: 186
Location: Mounds View, MN
The kernel code does not support autodetect. There is a compiler directive you need to set, in the board file I think, that selects the proper code to compile for 16 bit bus operation of the NAND flash.

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Tim Barr
Multitech Inc.


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